1. Strike,hit,knock imply suddenly bringing one body in contact with another. Strike suggests such an action in a general way: to strike a child.Hit is less formal than strike, and often implies giving a single blow, but usually a strong one and definitely aimed: to hit a baseball. To knock is to strike, often with a tendency to displace the object struck; it also means to strike repeatedly: to knock someone down; to knock at a door. See also beat.

Related to streak and stroke, and perhaps influenced in sense development by cognate Old Norse striuka. Sense of "to deal a blow" developed by early 14c.; meaning "to collide" is from mid-14c.; that of "to hit with a missile" is from late 14c. Meaning "to cancel or expunge" (as with the stroke of a pen) is attested from late 14c. An older sense is preserved in strike for "go toward."

n.

"concentrated cessation of work by a body of employees," 1810, from verb meaning "refuse to work to force an employer to meet demands" (1768), from strike (v.). Perhaps from notion of striking or "downing" one's tools, or from sailors' practice of striking (lowering) a ship's sails as a symbol of refusal to go to sea (1768), which preserves the verb's original sense of "make level, smooth."

Baseball sense is first recorded 1841, originally meaning any contact with the ball; modern sense developed by 1890s, apparently from foul strike, which counted against the batter, and as hit came to be used for "contact with the ball" this word was left for "swing and a miss" that counts against the batter. Bowling sense attested from 1859. Meaning "sudden military attack" is attested from 1942.